从网格视图向数据库插入多个数据
本文关键字:数据 插入 数据库 网格 视图 | 更新日期: 2023-09-27 18:15:56
我已经有一些数据到网格视图。现在我想在gridview中插入多行,怎么做呢?
如果我执行foreach循环,那么它将计算所有已经存在的行并多次插入数据。相反,我想只进入新行
下面是我的代码 private void userInsert()
{
if (MessageBox.Show("Do you want to add the new data ?", "Confirm ", MessageBoxButtons.YesNo,MessageBoxIcon.Question) == DialogResult.Yes)
{
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
try
{
foreach (GridViewRow dRow in userDataGridView.Rows)
{
cmd.CommandText = string.Format("insert into users(first_name,last_name,default_rate,default_location,spi_user_id,nickname) values('{0}','{1}',{2},{3},{4},'{5}')", userDataGridView.CurrentRow.Cells[0].Value.ToString(), userDataGridView.CurrentRow.Cells[1].Value.ToString(), userDataGridView.CurrentRow.Cells[2].Value.ToString(), locationID2ComboBox.SelectedValue, userDataGridView.CurrentRow.Cells[4].Value.ToString(), userDataGridView.CurrentRow.Cells[5].Value.ToString());
con.Open();
cmd.ExecuteNonQuery();
}
MessageBox.Show("Your data has been added successfully ", "Saved info", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
con.Close();
userSelect();
}
}
}
要么跟踪插入了哪些行(例如可以使用Tag
属性完成),要么修改SQL查询以检查数据是否已经存在
if not exists (select top 1 * from users u where u.first_name = '{0}' and u.last_name = '{1}')
insert into users(first_name,last_name,default_rate,default_location,spi_user_id,nickname)
values('{0}','{1}',{2},{3},{4},'{5}'
可能需要更多的参数唯一性检查。我还建议对SqlCommand
使用参数。
如果您想使用Tag
属性(仅当它是Winforms
项目!):
foreach (GridViewRow dRow in userDataGridView.Rows)
{
var check = dRow.Tag as bool? ?? false; //was row already processed?
if (check)
{
continue;
}
cmd.CommandText = string.Format("insert into users(first_name,last_name,default_rate,default_location,spi_user_id,nickname) values('{0}','{1}',{2},{3},{4},'{5}')", userDataGridView.CurrentRow.Cells[0].Value.ToString(), userDataGridView.CurrentRow.Cells[1].Value.ToString(), userDataGridView.CurrentRow.Cells[2].Value.ToString(), locationID2ComboBox.SelectedValue, userDataGridView.CurrentRow.Cells[4].Value.ToString(), userDataGridView.CurrentRow.Cells[5].Value.ToString());
con.Open();
cmd.ExecuteNonQuery();
dRow.Tag = true;
}
什么是用户id,谁生成的?
如果新用户的用户id为0,则它是简单的
foreach (GridViewRow dRow in userDataGridView.Rows)
{
if(userDataGridView.CurrentRow.Cells[<user id index>]==0)
{
//add into DB
}
}
希望对您有所帮助
您可以使用此事件添加新记录:
private void dataGridView1_UserAddedRow(object sender, DataGridViewRowEventArgs e)
{
//e.Row.Cells[0].Value <-- Use 'e.Row' argument to access the new row
}